As expected, prescription cannabinoids are effective antiemetics and appetite stimulants, and some studies report their effectiveness as adjunct therapy in chronic pain syndromes, spasticity, and glaucoma. Similar results are reported by the few studies of smoked cannabis plant for these same indications. As noted earlier, safe and effective alternative treatments for all these syndromes are available. Studies assessing psychological aspects of smoked cannabis and prescription cannabinoids uniformly report undesired effects: acute psychosis, poorer prognosis of chronic psychosis, or cognitive dulling in medical patients.